<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style>
    .Grid{
        display: grid;
        grid-template-columns: 400px 1fr 1fr;
        grid-template-rows: repeat(2,1fr);
        width: 900px;
        height:400px;
        background-color: lightblue;

    }
    a{
        background-color: black;
        color: white;
    }
</style>
<body >
<div style="display :flex;justify-content: center;">
<div class="Grid">
    <a href="#">你好</a>
    <a href="#">你好</a>
    <a href="#">你好</a>
    <a href="#">你好</a>
    <a href="#">你好</a>
    <a href="#">你好</a>
</div>
</div>
</body>
</html>